config BR2_TARGET_ROOTFS_AXFS bool "axfs root filesystem" help The Advanced XIP File System is a Linux kernel filesystem driver that enables files to be executed directly from flash or ROM memory rather than being copied into RAM. It has the ability to store individual *pages* in a file uncompressed/XIP or compressed/Demand Paged. So far, the only supported mode is 'XIP all', so all the files that have the execute attribute set will be XIP'ed. At the moment, the FS is not supported in Linux mainline (v4.3-rc5), so the kernel has to be built with the axfs patches to be able to read it. Patches can be found at: https://github.com/jaredeh/axfs